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Support for additional non-standard iCalendar objects

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package net.fortuna.ical4j.extensions.strategy;

import net.fortuna.ical4j.model.Prototype;

import java.util.function.Supplier;

/**
 * A strategy is an opinionated approach to creating iCalendar and vCard objects.
 * 
 * Strategy implementation MUST provide a new object instance for every call to
 * the {@link Supplier#get()} method.
 * 
 * Some strategy implementations may optionally support prototype instances that
 * are used as the baseline object for supplied instances.
 *
 * @param  the applicable object type
 */
public interface Strategy extends Supplier {

    default Strategy withPrototype(Prototype prototype) {
        throw new UnsupportedOperationException("Prototypes not supported for this strategy");
    }
}